LM2903WH datasheet(8/14 Pages) STMICROELECTRONICS

Part #	LM2903WH

Description	Low-power, dual-voltage comparator

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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8 / 14 page

Typical application schematics

LM2903WH

8/14

DocID028311 Rev 1

Figure 13: Low-frequency op amp with offset adjust

Figure 14: Zero crossing detector (single power supply)

Figure 15: Limit comparator

Figure 16: Split-supply applications - zero crossing

detector

Figure 17: Crystal controlled oscillator

Figure 18: Comparator with a negative reference

100 kΩ

10

kΩ

e

l

20 M

Ω

5 V

1N4148

5.1 k

Ω

5.1 k

Ω

100 kΩ

1/ 2

LM2903

5.1 k

Ω

10

kΩ

e

I

~

R

S

2R

S

V

(ref)

high

V

(ref)

low

2N 2222

V

CC

Lamp

1/ 2

LM2903

1/2

LM2903

2R

S

(12 V)

15 V

5.1 k

Ω

e

o

e

I

~

15 V

1/ 2

L M 2 9 0 3

2 k

Ω

200 k

Ω

e

o

V

CC

0

100 kΩ

200 k

Ω

1/2

LM2903

0.1 µF

f = 100 kHz

V

CC

= 15 V

15 V

5.1 k

Ω

e

o

e

I

~

15 V

5 V

1/2

LM2903

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LM2903WH Datasheet(PDF) 8 Page - STMicroelectronics

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